Implement #491549: On Windows, always use the native API for character set

2007-11-26 Tor Lillqvist <tml@novell.com>
Implement #491549: On Windows, always use the native API for
character set conversions instead of GNU libiconv. Almost all
codesets supported by GNU libiconv exist as Windows codepages.
One missing feature is the "C99" and "JAVA" pseudo codesets, but I
doubt that is worth worrying about.
* glib/win_iconv.c: New file. iconv() implementation for
Windows. Placed in the public domain by Yukihiro Nakadaira
<yukihiro.nakadaira@gmail.com>. From
http://yukihiro.nakadaira.googlepages.com/win_iconv.zip, his
2007-11-17 version.
* glib/gconvert.c: Include win_iconv.c on Windows.
* configure.in: Bypass iconv checks on Windows.
svn path=/trunk/; revision=5937